Kuyang'ana musanayike ma valavu

① Yang'anani mosamala ngati chitsanzo cha valavu ndi zofunikira zake zikukwaniritsa zofunikira pakujambula.

② Yang'anani ngati tsinde la valavu ndi diski ya valavu zimasinthasintha potsegula, komanso ngati zimamatira kapena zokhota.

③ Yang'anani ngati valavu yawonongeka komanso ngati ulusi wa valavu yolumikizidwa uli wowongoka komanso wosagwedezeka.

④ Onani ngati mgwirizano pakati pa mpando wa valavu ndi thupi la valavu ndi wolimba, mgwirizano pakati pa diski ya valavu ndi mpando wa valavu, chivundikiro cha valavu ndi thupi la valavu, ndi tsinde la valavu ndi diski ya valavu.

⑤ Onetsetsani ngati gasket ya valve, kulongedza ndi zomangira (mabolts) zikugwirizana ndi zofunikira za mtundu wa chogwirira ntchito.

⑥ Ma valve ochepetsa kupanikizika omwe ndi akale kapena omwe asiyidwa kwa nthawi yayitali ayenera kuchotsedwa, ndipo fumbi, mchenga ndi zinyalala zina ziyenera kutsukidwa ndi madzi.

⑦ Chotsani chivundikiro chotsekera doko ndikuwona kuchuluka kwa kutsekera. Disiki ya valavu iyenera kutsekedwa bwino.

Kuyesa kuthamanga kwa valavu

Ma valve otsika mphamvu, apakati mphamvu, ndi amphamvu mphamvu ayenera kuyesedwa mphamvu ndi kulimba. Ma valve achitsulo chosakanikirana ayeneranso kuchita kusanthula kwa spectral pa zipolopolozo chimodzi ndi chimodzi ndikuwunikanso zipangizozo.

1. Kuyesa mphamvu ya valavu

Kuyesa mphamvu ya valavu ndiko kuyesa valavu ili pamalo otseguka kuti muwone ngati pali kutuluka kwa madzi pamwamba pa valavu. Pa mavalavu okhala ndi PN ≤ 32MPa, kuthamanga kwa madzi kumakhala kowirikiza ka 1.5 kuposa kuthamanga kwa madzi wamba, nthawi yoyesera si yochepera mphindi 5, ndipo palibe kutuluka kwa madzi pa chipolopolo ndi packing gland kuti zitsimikizidwe.

2. Kuyesa kulimba kwa valavu

Kuyesaku kumachitika ndi valavu yotsekedwa bwino kuti muwone ngati pali kutuluka kwa madzi pamwamba pa valavu yotsekera. Kuthamanga kwa mayeso, kupatula ma valavu a gulugufe, ma valavu owunikira, ma valavu apansi ndi ma valavu otsekera, nthawi zambiri kuyenera kuchitika pa kuthamanga kwapadera. Pamene kungadziwike Pa kuthamanga kwa ntchito, kuyesaku kungathenso kuchitika pa kuthamanga kwa ntchito kokwana 1.25 nthawi, ndipo pamwamba pa kutseka kwa valavu disc payenera kukhala koyenera ngati sikutuluka madzi.

Malamulo onse okhazikitsa ma valavu

1. Malo oyika valavu sayenera kulepheretsa kugwira ntchito, kusokoneza ndi kusamalira zida, mapaipi ndi thupi la valavu lokha, ndipo mawonekedwe okongola a chogwiriracho ayenera kuganiziridwa.

2. Pa mavavu omwe ali pamapaipi opingasa, tsinde la valavu liyenera kuyikidwa mmwamba kapena pa ngodya. Musayike valavu ndi gudumu lamanja pansi. Mavavu, matsinde a valavu ndi mawilo amanja pa mapaipi okwera kwambiri akhoza kuyikidwa mopingasa, ndipo unyolo woyima pamlingo wotsika ungagwiritsidwe ntchito kuwongolera kutsegula ndi kutseka kwa valavu patali.

3. Kapangidwe kake ndi kofanana, koyera komanso kokongola; pa mavavu omwe ali pa standpipe, ngati njirayo ilola, gudumu la valavu ndiloyenera kwambiri kugwiritsidwa ntchito pamtunda wa pachifuwa, nthawi zambiri 1.0-1.2m kuchokera pansi, ndipo tsinde la valavu liyenera kutsatira kuyika kwa woyendetsa.

4. Pa ma valve omwe ali pamapaipi oimirira mbali ndi mbali, ndibwino kukhala ndi mzere wofanana wapakati, ndipo mtunda womveka pakati pa mawilo amanja suyenera kukhala wochepera 100mm; pa ma valve omwe ali pamapaipi oimirira mbali ndi mbali, ayenera kuzunguliridwa kuti achepetse mtunda pakati pa mapaipi.

5. Mukayika ma valve olemera pa mapampu amadzi, zosinthira kutentha ndi zida zina, mabulaketi a ma valve ayenera kuyikidwa; pamene ma valve amagwiritsidwa ntchito pafupipafupi ndikuyikidwa pamtunda woposa 1.8m kuchokera pamalo ogwirira ntchito, nsanja yogwirira ntchito yokhazikika iyenera kuyikidwa.

6. Ngati pali chizindikiro cha muvi pa thupi la valavu, komwe muviwo ukupita ndi komwe ukupita. Mukayika valavu, onetsetsani kuti muviwo ukuloza mbali yomweyo ndi komwe ukupita kwa valavuyo mu chitolirocho.

7. Mukayika ma valve a flange, onetsetsani kuti mbali zakumapeto kwa ma flange awiriwo zili zofanana komanso zozungulira, ndipo ma gasket awiri saloledwa.

8. Poyika valavu yolumikizidwa, kuti ikhale yosavuta kuichotsa, valavu yolumikizidwa iyenera kukhala ndi cholumikizira. Malo olumikizira ayenera kuganizira momwe ntchito yokonza ingakhalire yosavuta. Nthawi zambiri, madzi amayamba kuyenda kudzera mu valavu kenako n’kudutsa mu cholumikizira.

Malangizo okhazikitsa ma valavu

1. Chida chachikulu cha valavu ndi chitsulo chopangidwa ndi chitsulo, chomwe chimakhala chofooka ndipo sichiyenera kumenyedwa ndi zinthu zolemera.

2. Mukanyamula valavu, musaiponye mwachisawawa; mukakweza kapena kukweza valavu, chingwecho chiyenera kumangiriridwa ku thupi la valavu, ndipo ndikoletsedwa kwambiri kuimangirira ku gudumu lamanja, tsinde la valavu ndi dzenje la boluti la flange.

3. Vavu iyenera kuyikidwa pamalo abwino kwambiri kuti igwiritsidwe ntchito, kukonzedwa komanso kuyang'aniridwa, ndipo ndikoletsedwa kwambiri kuikwirira pansi pa nthaka. Mavavu omwe ali pamapaipi omwe amakwiriridwa mwachindunji kapena m'ngalande ayenera kukhala ndi zitsime zowunikira kuti zithandize kutsegula, kutseka ndi kusintha mavavu.

4. Onetsetsani kuti ulusiwo uli bwino ndipo wakulungidwa ndi hemp, lead oil kapena tepi ya PTFE